（单选题）
When scaling Coherence from one to two cache servers， it will not show the same scalability as two to four. Why？（）
A Coherence uses a more efficient TCMP algorithm going from two to four cache servers
B When going from one to two cache servers， object backups are copied across servers so work is doubled，but going from two to four is a fixed amount of work
C Near cache is enabled with a larger quorum thus performance is improved
D all of the above
正确答案
答案解析
略
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